Book excerpt: Where the paleta wagon rings its tinkly bell and carries a treasure of icy paletas in every color of the sarape . . . As she strolls through her barrio, a young girl introduces readers to the frozen, fruit-flavored treat that thrills Mexican and Mexican-American children. Create a masterpiece, make tough choices (strawberry or coconut?), or cool off on a warm summer's day--there's so much to do with a paleta.